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From: | ams AT ludd DOT luth DOT se (Martin Str|mberg) |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Some assembly questions |
Date: | 18 Mar 1999 17:45:44 GMT |
Organization: | University of Lulea, Sweden |
Lines: | 17 |
Message-ID: | <7cre48$h9i$2@news.luth.se> |
References: | <199903170746 DOT IAA06061 AT login-2 DOT eunet DOT no> <7cq156$q5$2 AT news DOT luth DOT se> <7cra9a$ui$1 AT murdoch DOT acc DOT Virginia DOT EDU> |
NNTP-Posting-Host: | queeg.ludd.luth.se |
X-Newsreader: | TIN [UNIX 1.3 950824BETA PL0] |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
Clark L. Coleman (clc5q AT cobra DOT cs DOT Virginia DOT EDU) wrote: : Your were given a bad mnemonic: "setc" is actually "stc". : : asm volatile("clc"); /* clears (sets to 0) the carry flag */ : asm volatile("cmc"); /* complements (inverts) the carry flag */ : asm volatile("stc"); /* sets (to 1) the carry flag */ Ahh! Thanks! Perhaps somebody can inform me on the difference (if there is one) between "cmpl $1, %eax" and "testl $1, %eax". It sounds to me like they do the same thing, so I think I'm missing something... Shostakovich, String Quartet No. 15, MartinS
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